A Phase II Trial Assessing the Tolerability of Palbociclib in Combination with Letrozole or Fulvestrant in Patients Aged 70 and Older with Estrogen Receptor-Positive, HER2-Negative Metastatic Breast Cancer
Effective Tuesday, March 3rd, 2020, at 4:30 PM ET, study A171601 is permanently closed to new patient registration.
